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Inspection Procedure

NOTE: Be sure to read DESCRIPTION before performing the following procedures.
  1. CHECK NAVIGATION RECEIVER ASSEMBLY POWER SOURCE CIRCUIT 

    Refer to the NAVIGATION RECEIVER ASSEMBLY POWER SOURCE CIRCUIT .

    If the power source circuit is operating normally, proceed to the next step.

  2. INSPECT NAVIGATION RECEIVER ASSEMBLY 
    1. Disconnect the navigation receiver assembly connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      ATX+ (R15-5) - ATX- (R15-15) Always 60 to 80 Ω
      TX+ (R14-9) - TX- (R14-10) Always 60 to 80 Ω
      3. Fig 1: Identifying Navigation Receiver Assembly
      G05141304Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE NAVIGATION RECEIVER ASSEMBLY 

    OK: Go to Next Step 

  3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
    2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
    3. Identify the component which has stored this code.

      Component Table: 

      COMPONENT CHART

      Display Component
      Rr-TV Television display assembly
      DSP-AMP Stereo component amplifier

      HINT:

      "NAVI" is the component which has stored this code in the example shown in the illustration.

      Fig 2: Diagnostic Tool Display - LAN Monitor NAVI
      G04966898Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK HARNESS AND CONNECTOR 

    HINT:

    For details of the connectors, refer to "TERMINALS OF ECU ".

    1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the navigation receiver assembly and the component which has stored this code.
      1. Disconnect all connectors between the navigation receiver assembly and the component which has stored this code.
      2. Check for an open or short in the AVC-LAN circuit between the navigation receiver assembly and the component which has stored this code.

        OK: There is no open or short circuit. 

        Fig 3: AVC-LAN Circuit - Warning Diagram
        G05141309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  5. REPLACE NAVIGATION RECEIVER ASSEMBLY 
    1. Replace the navigation receiver assembly with a normal one and check if the same problem occurs again.

      OK: Same problem does not occur. 

    NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE 

    OK: END 

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